PURPOSE: To surely attain the print with a width corresponding to a dot data by using a dot elimination means eliminating one dot at the end of a dot data converted into 2 dots or over in the unit of dots and supplying dot data with dots eliminated therefrom to a laser printer.

CONSTITUTION: A received data is expanded and the expanded data is converted into a dot data of 2 dots or over in the unit of dots. Then one dot at the end of the converted dot data is eliminated by a dot elimination means 38 and a laser printer 2 applies the printing based on the dot data from the eliminated dots. Thus, the print with a width corresponding to the dot data is surely obtained.